Can you run Qwen3.8 27B on RTX 4070?
Qwen3.8 27B Q4_K_M on the NVIDIA GeForce RTX 4070 — verdict, VRAM math and estimated speed.
No, Qwen3.8 27B does not realistically run on the NVIDIA GeForce RTX 4070. 16.5 GB weights at Q4_K_M vs 10.8 GB usable VRAM; ~2 tok/s est..
→ Cheapest tracked card that runs it: AMD Radeon RX 7900 XT (20 GB)
VRAM math and speed are ModelFit engine estimates, not measurements. Commands are registry-verified Ollama tags.
Cite this page: ModelFit, Qwen3.8 27B on RTX 4070, https://modelfit.io/can-i-run/qwen3.8-27b-q4-on-rtx-4070/, updated August 2026, CC BY 4.0.
Last updated: August 16, 2026 · Editor: ModelFit Team
Memory math: weights + context vs budget
Weights take 16.5 GB. Context costs extra KV-cache on top — this is where long-context sessions break on cards that technically fit the weights.
KV-cache figures assume an fp16 cache, the llama.cpp/Ollama default. Standard GQA models use a size-class estimate (8 KV heads x 128 head dim class); hybrid linear-attention models (Qwen3.5/3.6, Qwen3-Next) use the exact per-token cost from their published config, since only their sparse full-attention layers cache KV. A q8_0 KV cache roughly halves either figure. Estimates, not measurements.
Upgrade path
The cheapest tracked card that runs Qwen3.8 27B comfortably is the AMD Radeon RX 7900 XT (20 GB VRAM).
See the RX 7900 XT pageQwen3.8 27B on RTX 4070: FAQ
Can the NVIDIA GeForce RTX 4070 run Qwen3.8 27B?
Not realistically. Qwen3.8 27B (Q4_K_M) needs about 16.5 GB against 10.8 GB usable VRAM on the RTX 4070; even with heavy CPU offload it would run at unusable speed.
How much VRAM does Qwen3.8 27B need?
About 16.5 GB for the weights at Q4_K_M, plus KV-cache for context: roughly 1.0 GB extra at 16k tokens. The RTX 4070 budget is 10.8 GB (12 GB x 90%).
What is the best quantization of Qwen3.8 27B for the RTX 4070?
Stick with the Q4_K_M build at 16.5 GB — every heavier quant exceeds the 10.8 GB usable VRAM.
What GPU do I need to run Qwen3.8 27B comfortably?
The cheapest tracked card that runs Qwen3.8 27B (Q4_K_M) fully in VRAM is the AMD Radeon RX 7900 XT (20 GB).